Governor Model: WPIDHY and WPIDHYD

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < Treg < 0.5*Mult*TimeStep then Treg = 0, ElseIf 0.5*Mult*TimeStep < Treg < Mult*TimeStep then Treg = Mult*TimeStep
• If 0.0 < Ta < 0.5*Mult*TimeStep then Ta = 0.5*Mult*TimeStep
• If 0.0 < Tb < Mult*TimeStep then Tb = Mult*TimeStep
• If 0.0 < Tw < Mult*TimeStep then Tw = Mult*TimeStep
• If Velmax < Velmin then swap the values. If Velmax < 0 then Velmax change sign to positive. If Velmin> 0 then change sign to negative.
• If Gmax < Gmin then swap the values.
• If Pmax < Pmin then swap the values.

Mult represents the user-specified value Minimum time constant size as multiple of time step option on the Validation page of the Transient Stability Dialog

TimeStep represents the integration time step being used as described on TimeStep

Following treatment is handled during the transient numerical simulation

• If Gate > Gmax , then Gmax = Gate or if Gate < Gmin , then Gmin = Gate
• If Pmech > Pmax , then Pmax = Pmech or if Pmech < Pmin , then Pmin = Pmech